Nicotinamide can accelerate metabolism and accelerate the shedding of keratinocytes. Nicotinamide has a small molecular weight, which can be directly absorbed by epidermal cells, stimulate the vitality of some declining cells, promote the synthesis of collagen, prevent excessive deposition of melanin, and achieve whitening effect.
2. Control oil and collect pores.
When the content of nicotinamide in skin care products reaches 2%, it can reduce the production of fatty acids and triglycerides in sebum secreted by skin, achieve the effect of controlling sebum secretion, reduce sebum secretion, and gradually shrink pores, thus achieving the purpose of shrinking pores. The reason is that nicotinamide can down-regulate the melanosome transport from melanocytes to keratinocytes without inhibiting tyrosinase activity or cell proliferation, thus affecting skin pigmentation. It can also interfere with the cell signal channel between keratinocytes and melanocytes and reduce melanogenesis. Obviously, the effect depends on whether the ingredients are enough, and it usually takes a month or two to whiten.